3-((1S,3aS,6R,7aS,8R)-7a-Hydroxy-1,9,9-trimethyl-octahydro-3a,6-ethano-inden-8-yl)-propionic acid

(2E,1'S,3a'R,4'R,6'R,7a'S)-5-(7a'-hydroxy-1',5',5',-trimethyloctahydro-3a',6'-ethano-3a'H-inden-4'-yl)-2-methylpent-2-enoic acid